I guess you could print out charts from your computer but keep a couple of things in mind. If you are using a bubble jet printer like most of us your "charts" will not be more than 8" x 10". The paper will most likely be flimsey and more importantly the ink is not even close to water proof. In other words your charts will be small and disposable. Not really a good backup if you are in a tight situation. Even with two chart plotters and a computer running Nobeltec I still keep standard paper charts on board. I have had numerous crashing problems runing Nobeltec on two different computers and three different GPS''s. It''s a nice planning tool but that''s as far as I go with it.